High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway. Over the next 10 days, changes in the stratosphere will upend weather ...

The polar vortex is taking shape over the North Pole, and it is starting the season stronger than normal, based on the latest sub-seasonal forecasts from the European Centre for Medium-Range Weather ...

In an early sign of the winter weather that's coming, the dreaded polar vortex is making news yet again. The polar vortex is "ramping up from its summer slumber," said meteorologist Judah Cohen in an ...

The polar vortex, a circulation of cold air over the Arctic, is currently stronger than normal. A strong and stable polar vortex helps keep the coldest Arctic air contained near the North Pole. A very ...